Disinfecting agents.



Io Drawing.

" UNITED STATES PATENT OFFICE. f

IAX1ENGELHANN, IBENEDIK'I MERKEL, All) GIEOBG- WESENBEBG, OF ELBEBFELD, GERMANY, ASSIGNORS 'IO FABBENFABRIKEN V'OBH. FRIEDB. BAYER & 001, OF

ELIBEBFELD,GERMANY, A CORPORATION OF v DISINFECTING AGENTS.

To all whom it may concern:

Be it known that we, MAX ENGELMANN, BENEDIKT MERKEL, and GEORG WESENBERG, chemists, citizens of the'German Empire, residing at Elberfeld, Germany, have mvented new and useful Improvements in New Disinfecting Agents, of which thefollowing is a specification.

It has been observed that the salts of the hitherto unknown mercuric' compounds of substituted benzoic acids especially al'kyl-, halogen-, or a1kyl-halogen-benzoic acids substituted in the nucleus have a disinfect-v ant power, superior in many cases to that of sublimate, especially in the presence of.- -soap or of serum. The above mentioned compounds are therefore therapeutically valuable products.

The new bodies containing in their molecule the characteristic group R meaning a benzol substance, are obtained by treating the corresponding acids with and insoluble in alcohol, ether and benzene.--

On being boiled with hydro-chloric acid they are split up HgCl being produced. r p

In order to illustrate the new process more fully the following examples are given, the parts being by weight:

Example 1: 100 parts of ortho-toluylic acid are well mixed with40 parts of mercuric oxid and heated in an oil bath atfrom 130-140 C. until a test portion of the melt forms a clear solution with caustic soda lye. After cooling the mixture is extracted with alcohol and dissolved in highly diluted caustic soda lye in order to remove the excess of acid. By passing carbonic acid Specification of L Patent. Patented July 30.1912.

' 1 Application filed December 30, 1910. Serial No. 600,082. I

through the solution the anhydrid of the I inercuric-ortho-toluylic acid A co\ .L LH j is precipitated as a fine white crystalline the usual organic solvents, but it is very easily soluble in alkalis forming the correspondln' g salts. By heating it with by rochloric acid the. compound is split up "iiito ortho-tol-uylic acid and. mercuric chlorid.

:On being'heated it is decomposed without melting.

. Example 2: 100 parts of ortho-chlorobenzoic acid and 60 parts of mercuric acetate are heated in an oil bath to from ;130140- C. until a test portion forms a clear solution with caustic soda lye. i order to remove the excess of acid the cooled Qmass is treated with dilute alkali and for this purpose the melt is dissolved in highly diluted caustic soda care being taken to avoid an excess and the solution is then filtered. By passlng carbonic acid through the solutionthe anhydrid of oxymercuriclortho-chloro-benzoic acid is precipitated as a white crystalline powder. It does not diifer in its properties from the compound described according to Example 1.

Exampleg: 100 parts of the mercury salt or ortho-iodo-benzoic acid (obtainable by treating the sodium salt of ortho-iodo-benzoic acid with mercuric chlorid in aqueous solution) suspended .in 400 parts of araffin oil are heated at-from' 170'180 until mercuric oxid is no more precipitated from a test portion by the addition of soda lye.

powder. It is almost insoluble in water and The parafiin oil is removed by treatment with alcohol and the residue is purified by solution in caustic soda lye and reprecipitation with carbonic acid. The anhydrid of the mercuric ortho-iodo-benzoic acid has properties similar' to the ortho-chlorin compound.

Instead of the ortho-toluylic or orthochloro-benzoic acid also other of the above mentioned acids can be'used, e. g. orthobromo-benzoic acid ormetatoluylic acid."

We claim I p 1. The herein described mercuric compound of benzoic acids substituted in the nucleus containing in their molecule the characteristic group co R/ v\ in which R stands for a; benzol substance unsubstituted by an oXy group in ortho position to the C() group, which are whitislr'nrystalline compounds soluble in dilute alkalis forming salts, insoluble in alcohol, ether and benzene, splitting ofi HgCl on being boiled with hydrochloric acid; and 'being valuable disinfectants, substantially as described.

2. The herein described mercuric compounds of ben zoic acids substituted in the nucleus, containing in their molecule the characteristic group in which R stands for an alkyl substituted scribing Witnesses.

benzol substance, which are whitish crystalline compounds soluble in dilute alkalis in which R stands for an alkylsubstituted benzol substance, which are whitish crystalline compounds soluble in dilute alkalis forming salts, insoluble in alcohol, ether and benzene, splitting cit HgCl on being boiled with HCl; and being valuable disinfectants, substantially as described.

. 4.,The .herein described oxy mercurictoluylic acid anhydrid obtainable by heating ortho-toluylic acid with mercuric oxid, which is a white crystalline powder soluble indilute alkalis, insoluble in alcohol, ether and benzene, being split up into orthotoluylic acid and mercuric chlorid on being boiled with hydrochloric acid; and being a valuable disinfectant, substz'rntially as described.

- In testimony whereof we have hereunto set our hands in the presence of two sub- MAX ENGELMANN.

BENEDIKT MERKEL. [L. s.]

GEQRG WESENBERG. [L. 5.]

Witnesses: I

CHAS. J. WRIGHT,

.ALFRED HENKEL. 

